[Main Page]

Rechnerlexikon

Die große Enzyklopädie des mechanischen Rechnens

3.235.66.217 | Log in | Help

  DE  EN  FR  IT 
Main Page
All pages
Recent changes

Printable version
Discuss article

article
image
patent



Special pages
Pfeil.gif Patents  Pfeil.gif USA  Pfeil.gif 1871

Patente aus den USA 1871


  • Patent:US113794 18.04.1871 Charles W. Pyle : Improvement in Counting-registers
  • Patent:US115318 30.05.1871 Edwin A. Hickman : Improvement in apparatus for illustrating trigonometry
  • Patent:US117169 18.07.1871 E. M. Hamilton : Adding Machine
  • Patent:US119871 10.10.1871 C. C. Marsh : Instrument for averaging Accounts
  • Patent:US120609 07.11.1871 Alexander P. Atkinson : Improvement in counting-registers


According to copyright you are allowed to cite verbatim from rechnerlexikon.de when giving the reference.